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Frequently Asked Questions (FAQ) / Calibrated Gems for Replacing Lost Stones & Custom Jewelry

What is a Calibrated Gemstone?

Calibrated Diamond and Sapphire
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A calibrated gemstone is one that has been cut to fit standard size commercial gemstone jewelry mountings and settings. Examples are 7 mm x 5 mm oval shape gemstones, or a 6 mm round shape gem. Calibrated gemstones are not cut to exact measurements, but they are cut to sizes that most standard size mountings can accommodate.

There will always be some variance; usually for gemstones over 1 carat in weight, a size variance within 0.04% is acceptable, depending on the exact jewelry design of course. Above in the photo are two 6 mm round diameter stones, but the diamond is almost half the weight of the sapphire.This is why gemstones should be bought by size rather than weight.

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Enlarged Gemstone Image